Machine fob jressihg stones



Nov. 25, w24 1,517073 f J. W.. KENT MACHINE FOR DRESSING STONES Fil'ed Aug. 28. 1923 2 Sheets-Sheet 1 (UWM gwuemtoz .5. W. KENT MACHINE FOR DRESSING STONES Filed Aug. 28 1923 2 Sheets-Sheet 2 rll/ WIN-*1Q r"""w" '.n'" II. ""W'IW 1. 45

y il V35-Y m36 39 40 15 Y 2139 as 4Z @om YVM VN An.

Patented Nov. 25, i924.

UNITED STATES l,5l7,07l

PATENT FFLE..

JAMES W. KENT, 0F BROOKLYN, NEW" YGRK.

Application filed August 28, 19553.

To ZZ whom may concern.'

le it known that I, JAMES lll. KENT, a citizen of the United States, and resident of lroolrlyn. in the county of Kings and itatc of New York, have invented certain new l useful lmpiovemcnts in lflachines for Dressing Stones, of which the following is a specification.

This invention relates to machines for dressing mill stones of the kind used. in paint mills and other similar or analogous industries.

The object of the invention is to provide a generally improved stone dressing' or cutting,` machine of the portable type in the sense, that the machine is adapted to be moved about easily to avoid the necessity for transporting" the heavy stones to the machine, The objects of the invention also include simplicityY of design and construetion, accessibility of the various submechanisnis for performing` the several operations together with facility and ease in operating` and aiiljustino` the mechanism.

lilith the above and. other objects in view., my invention is embodied in a stone dressing` machine as hereinafter set forth.) while reference is had to the acompunying drawings in which- Fig. l is a side view of a stone dressing machine embodying` my invention, showing the machine in operation on a stone.

Fig. 2 is a plan view of the machine with parts removed.

F 3 is a plan view of a mill stone sl'iowinfn` the work to be performed by the machine.

Referring first to Figure 3 the numeral l denotes a mill stone, such for instance as are used in paint mills. But the invention is not limited to a machine for dressing paint mill stones, but is capable of dressing` or cutting stones for other purposes. In the instance illustrated the stone is provided with a number of larger Lgrooves or depressions 5, 5 and is further divided into sections which are cut with a plurality of regularly spaced and arranged narrow grooves represented by the lines 6, 6. The machine according to this disclosure cuts the narrow grooves 6.

Referring` now to Figure l the numeral 7 denotes a portable stand which supports the machine and. the stone to be dressed. The stand is of suitable design and construction and is provided with wheels 8, 8, so as to reference DRESSNG STONES.

Serial No. 659,729.

transport the machine easily to the place where the stones may happen to be located or stored.

The stand provided with a pivot {Y} around which rotates a worlr table l0 ou a plurality of suitable rollers ll,J ll. The stone 4 is supported on the wol-lr table and is rotated by the operator as the wor require. To one side of secured bracket l2 whi the machine hase l0 ,i which latter directly secured to the stand by bolts The base ll of the machine .forms a dove tailed groove l5 in which slides a. b acket 'lli having a depending portion formi 1.6 a nut l?, see Figure 2. 18 is a. screw shaft which is secured to the base lll and is provide-'fil with a. handle'lQ. The screw shaft engages the nut i7 .in an obvioiiis manner so that when said shaft is rotated by means oi its handle 19. the bracket 16 is caused to slide in the `groove l5.

r.llo the bracket 1G is pivoted at 2() a cylindrical upright or cutter arm guide support 2l. rllhe upright is at its bottom provided with. a. curved slot Q2 through which passes bolt Q3 into the bracket lo. lent-e by loosening said holt the upright 2l may be adjusted in a vertical plane around S the aforesaid pivot Q0 after which the holt 23 is tightened to secure the uprigijht in adjusted position.

The numeral 24 denotes a cutter arm, which is provided with a boss 25 which surrounds and slides on the upright 2l. 'lo this end there is secured u nut 26 to the said boss, and to the upright is secured :i screw shaft 27 having a handle QS. The screw shaft passes through said nut .QG in engagement therewith. When the screw shaft is rotated by its handle, the critter arm is moverL up and down on the upright 2l. A key 29 on the upright prevents relative rotative movement between the upright and the cutter arm as is obvious.

rlhe cutter arm extends to one side of the upright 2l and in over the work table 10 where said arm supports the cutting means. To the opposite side of the boss 25 the cutter arm 24 forms a motor base 30 upon which is mounted an electric motor 31. The cutting` means comprises a plurality of cutting wheels or cutters 33, 33 mounted to rotate on a shaft 34. The shaft 34 is journaled in a cutter carriage 35 which hangs beneath the cutter arm 24 and on which arm carriage is arranged io slide by means oil suitable gni des or flanges 36.) 56 which overlio and slide on the Cutter arm bas-e 37, see Figure 2t on both sides ol" said arm. rlhe ont ter shaft 34: Carries a pulley 38. 'lvo l ay means or the slo and bolts V "au f 'llhe entier see re z rarriag'e 35 "or'n a nut- Fija. and through the latter passes` a screw shaft having its bearings aad on the entter arm 2% The shalt i rotated by a handle to canse the entiteiearriage to slide along` the cutter arm in an obvions manner.

ln operation, the machine is wheeled to the place Where the stone happens to be. The stone is placed on the rotatable work table l() preferably in eoi'ieentrio position thereon. Arlhereaiter the maohine is adjusted tor the operation, that is, the cutter carriage is moved towards the upright 2l by rotation oli the screw shaft 37 to properly position the cutters at the edge ot` the stone rlhe proper elevation ot the Cutters is obtained by rotatingl the serevv shaft 2l', and the cutting` plane is adjusted laterally by tilting' the upright 2l around the pivot 20, certain stones having raised, onrved or slanting ugper surfaces require more or less adjustment or the upright 2l trom its normal vertical. position. The cutters are positioned transversely of the stone parallel to the shalt 3d by means oli the shaft 18 aforesaid. 'Vlhe motor is then started and the cutters eon'imence to rotate to out or dress the stone. .fis the cutting prooeeds, the cutters are fed in over the stone by operating` the handle 50 to rotate the screw shalt al' While at the same time the on ters are adi usted vertically by operation of the screw shaft 27. llVhenever reqnirech the Work table 10 With the stone l- ,is rotated to obtain the proper angle oi the grooves to be out.

@a nar/,ors

ai rotate thereom a member lured o said standi a bracket slidably supported on Caid base member, an upright f ,vol/.xd on c`aid bracket, means 'lor adjusting' 'l t towards and away from said Stein work ta le i cutter arm adapted to slide o'. :d upright, means :fior adjusting said i, v firm. vatting; means supported on sarai ente arm in position to be operated in over said work table, dr ving means for said rait-Mrt? means, manually operated means tor moviiiig said cutting means in over the work ri on said Work table, Vrwhich latter is adapted to be operated mann ally to position the Work with respect to said rotting means.

E3. il maehine ot the character described comprising an upright7 a Cutter arm supported tl ereon in non-rotatable relation theretoa outtiilgY means slidably mounted on said Cutter arm7 driving means on the latter toi' said cutting' n'ieans, mechanism on said cutter arm tor operating said cutting means 'zliereon while said cutting` means are being driven bj; said driving` means, a Work snpport moi'inted beneath said cutter arm, n'ieelianism tor raisinfbY and lowering said cutter arm to bring; the cutting` means into working relationship with the Work, means Yfor adjustably supporting the said upright, means for operatingsaid adjustable snpporting n'ieans to p sition said Cutter arm in predetermined lateral relationship with the said Work support, a stand 'for supiiortingj the latter and all ot the other aforesaid elements, said Worlr support being rotatably mounted on the said stand for the purpose specied.

JAMES lV. KENT. 

